What's the difference between scholarly and popular sources?

Your instructor said that you cannot use the Internet to find sources for your paper. Instead, you have to use "scholarly journals" and other academic resources from the library. So what does that mean?

Scholarly journals are published by universities, societies, or associations of specialized fields. Articles are written by scholars in that field who present the results of original research and experimentation or provide technical or professional information. They go through a peer-reviewevaluation process before being published. Peer-reviewed articles are reviewed by other scholars in the same field who provide feedback about the article's quality, accuracy, relevance to scholarship in the field, validity of research methodology and procedures, and more.